Finding the Fourth Proportional to 120,355.55, 166,093.16 and 65,909.98

Step by Step Solution

1. Step 1: Write the proportion equation
   120,355.55 : 166,093.16 = 65,909.98 : x
2. Step 2: Convert to fraction form
   120,355.55/166,093.16 = 65,909.98/x
3. Step 3: Cross multiply
   120,355.55x = 166,093.16 × 65,909.98
4. Step 4: Simplify right side
   120,355.55x = 10,947,196,853.74
5. Step 5: Solve for x
   x = 10,947,196,853.74/120,355.55
6. Step 6: Final answer
   x = 90,957.14